Hard drive fun with the kernel
Hi all
Some time ago I noticed that my hard drives became dog slow. It reminded me a lot of hard drive access in the pre-500MHzish days where accessing the hard drive locks the system up while it seeks data, which sounds like an issue with DMA.
As far as I can tell, this problem started when I compiled a custom kernel to enable my graphics card drivers. However, I'm buggered if I know what option it is I haven't selected and I am hoping that one of you will know off the top of their heads what my issue is.
Thanks in advance.
Kernel: Debian kernel source, kernel versions 2.6.18 and 2.6.22
Under 2.6.18, hdparms tells me udma mode was enabled on all drives.
Under 2.6.22, hdparms tells me using_dma is false on the two chipset-connected drives (on board RAID/ATA controller disk is fine). (have they changed the default hdparms output between versions, or did I forget a switch?). Trying to enable dma via hdparms fails.
Some time ago I noticed that my hard drives became dog slow. It reminded me a lot of hard drive access in the pre-500MHzish days where accessing the hard drive locks the system up while it seeks data, which sounds like an issue with DMA.
As far as I can tell, this problem started when I compiled a custom kernel to enable my graphics card drivers. However, I'm buggered if I know what option it is I haven't selected and I am hoping that one of you will know off the top of their heads what my issue is.
Thanks in advance.
Kernel: Debian kernel source, kernel versions 2.6.18 and 2.6.22
Under 2.6.18, hdparms tells me udma mode was enabled on all drives.
Under 2.6.22, hdparms tells me using_dma is false on the two chipset-connected drives (on board RAID/ATA controller disk is fine). (have they changed the default hdparms output between versions, or did I forget a switch?). Trying to enable dma via hdparms fails.
